... steel pipes like following:1. seamless steel pipe (A53, A106, API 5L, A179, A192, A213, A333, DIN1629, DIN17175, Russian standard, Franch stan ... , 3PE, IPN8710, 2PE, Epoxy powder)5. welded steel pipe (A53, API 5L, BS1387, EN10025) 1Productstainless steel pipe2StandardU.S.A.ASTM A312/A213 ...